Abstract: A display device includes a substrate that includes a display area and a non-display area, a display element layer disposed on the display area of the substrate, an opposing substrate that faces the substrate and the display element layer, a sealing member disposed on the non-display area and that couples the substrate and the opposing substrate, and a filler disposed between the substrate and the opposing substrate. A thickness of the filler varies in the range of 60% to 400% of a thickness of the sealing member.

Abstract: Provided is a device for measuring electrolyte ions that is capable of providing a uniform pH environment in the region of an optode, and a method of measuring electrolyte ion concentration using the device.

Abstract: A microfluidic channel for effectively removing a gas from a fluid, and microfluidic apparatus including the same are provided. The microfluidic channel includes a first channel having a uniform cross-sectional area, and a second channel connected to the first channel and having a gradually expanded cross-sectional area.

Abstract: Provided is a device for measuring electrolyte ions that is capable of providing a uniform pH environment in the region of an optode, and a method of measuring electrolyte ion concentration using the device.

Abstract: A surface acoustic wave (“SAW”) sensor system comprises a signal generating part, which applies an electrical signal to a SAW sensor, the SAW sensor connected to the signal generating part, which converts the electrical signal into a SAW, senses a measurement target using the SAW, and converts a SAW output corresponding to the measurement target into an electrical signal, and a signal measuring part connected to one side of the SAW sensor, which detects a change in the electrical signal by time-gating a multiple-transit-echo wave.

Abstract: A surface acoustic wave (“SAW”) sensor system comprises a signal generating part, which applies an electrical signal to a SAW sensor, the SAW sensor connected to the signal generating part, which converts the electrical signal into a SAW, senses a measurement target using the SAW, and converts a SAW output corresponding to the measurement target into an electrical signal, and a signal measuring part connected to one side of the SAW sensor, which detects a change in the electrical signal by time-gating a multiple-transit-echo wave.

Abstract: A reversible drive device for bicycles, allowing a bicycle to go forward by a normal or reversed rotating force of a pedal without forcing a user to operate any lever, is disclosed. The drive device has a simple construction with a reduced number of parts and allows the rear wheel 10 to be rotatable in a reversed direction, thus allowing the bicycle to be moved backward. The drive device is integrated into a single assembly and is detachably attached to either the rear wheel hub shaft 11 or a pedal shaft 21, so the device allows a user to easily repair or change the drive device and improves work efficiency while producing the drive device. Two crescent stoppers 18 are formed on each end of the fixed shaft 17 so as to effectively prevent the shaft holding yoke of the rear wheel fork 1 from being unexpectedly opened.